Control of materials by coherent phonon excitation

通过相干声子激发控制材料

• 批准号: 09640491
• 负责人: EMA Kazuhiro
• 金额: $ 2.05万
• 依托单位: Sophia University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 1997
• 资助国家: 日本
• 起止时间: 1997 至 1998
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-09640491/
• 关键词: coherent phonon; phonon; Raman scattering; femtosecond pulse; nonlinear spectroscopy; low-dimensional material; exciton; polymer; フェムト秒分光; 相転移; ポンプ・プローブ

Coherent phonon is created by the optical excitation using a ultrashort pulse whose duration is shorter than the period of the phonon vibration. If the single excitation pulse is replaced by the pulse train where the pulse separation is equal to the period of the phonon vibration, the amplitude of the coherent phonon increases drastically. Using the pulse-train excitation we were trying to control of the phase of materials. Our research results are following ;1) We set up the system for the experiments of the creation and measurement of coherent phonon. Using a Bi material, we confirmed that our system worked well, and observed the amplification of coherent phonon with a pulse-train excitation.2) We studied the properties of the coherent phonon in the exciton resonance region of a layered semiconductor PbIィイD22ィエD2.3) We studied the excitonic nonlinearity and the interaction between the exciton and the coherent phonon in a self-organized quantum-well material (CィイD26ィエD2HィイD213ィエD2NHィイD23ィエD2)ィイD22ィエD2PbIィイD24ィエD2.4) We studied the interaction between the exciton and the coherent phonon in a π-conjugated polymer polythiophene.

相干声子是通过使用持续时间短于声子振动周期的超短脉冲进行光学激发而产生的，如果用脉冲间隔等于声子振动周期的脉冲串代替单个激发脉冲，则相干声子会产生相干声子。我们试图利用脉冲序列激励来控制材料的相位，我们的研究结果如下：1）我们建立了相干声子产生和测量的实验系统。使用2）我们研究了层状半导体PbI-D22 D2激子共振区相干声子的特性。 3）研究了自组织量子阱材料中的激子非线性以及激子与相干声子之间的相互作用(CD26D2HD213D2NHD23D2)D22PbID24D2.4) 我们研究了π共轭聚合物聚噻吩中激子和相干声子之间的相互作用。

项目成果

H. Kawahara, et al.: "Third-order Optical Nonlinearity in Regioregular Head-to-Tail Coupled Poly (3-Hexylthiophene)"Opt. Rev.. 4. 188-190 (1997)

H. Kawahara 等人：“区域规则头尾耦合聚（3-己基噻吩）中的三阶光学非线性”选项。

S. Kishino, et al.: "Spectra of |χィイD1(3)ィエD1(ω;ω,ω,-ω) at excitonic resonance in poly(3-[2-((S)-2-methylbutoxy)ethyl]thiophene)"Nonlinear Optics. 22. 361-364 (1999)

S. Kishino 等人：“聚 (3-[2-((S)-2- 甲基丁氧基)乙基]噻吩中激子共振下 |χiiD1(3)ieD1(ω;ω,ω,-ω) 的光谱)“非线性光学。22. 361-364 (1999)

J.Ishi: "Third-order optical nonlinearity due to excitons and biexcitons in a self-organized quantum-well material (C_6H_<13>NH_3)_2 PbI_4" J.Nonlinear Opt.Phys.Mater.Vol.7. in press (1998)

J.Ishi：“自组织量子阱材料 (C_6H_<13>NH_3)_2 PbI_4 中激子和双激子引起的三阶光学非线性”J.Nonlinear Opt.Phys.Mater.Vol.7。

Y. Ueno, et al.: "Ultrafast Excitonic Nonlinearity in Regioregular Head-to-tail Coupled Poly (3-Hexylthiophene)"J. Nonlinear Opt. Phys. Mater. 7 (1). 503-506 (1998)

Y. Ueno 等人：“区域规则头尾耦合聚（3-己基噻吩）中的超快激子非线性”J。

J. Ishi, et al.: "Third-order optical nonlinearity in a self-organized quantum-well material (CィイD26ィエD2HィイD213ィエD2NHィイD23ィエD2)ィイD22ィエD2(CHィイD23ィエD2NHィイD23ィエD2)PbィイD22ィエD2IィイD27ィエD2"Nonlinear Optics. 22. 365-368 (1998)

J. Ishi 等人：“自组织量子阱材料 (CD26D2D213D2NHD23D2) (CHD23D2NHD23D2)PbD22D2ID27D2 中的三阶光学非线性”非线性光学 22. 365-368 (1998)。